Definition of nyah-nyah in English:

nyah-nyah

(also nyah-nyah-nyah)

Pronunciation /ˌnjɑːˈnjɑː/ /ˈnjɑːˌnjɑː/ /ˌnjaˈnja/

verb

  • To behave in a childishly supercilious or derisive manner towards someone; to taunt someone.

Origin

1980s; earliest use found in Adweek. Reduplication of nyah.